please walk me through these

7. On April 1 of the current year, a company paid $150,000 to purchase 7%, 10-year bonds that had a par value of $150,000 and paid interest semiannually on October 1 and April 1. The company intends to hold the bonds until they mature. Prepare the journal entry to record the receipt of the semiannual interest payment on April 1 of the following year. 8. A company reported net income of $100,000 and average total assets of $425,000. Calculate its return on total assets. 9. A company had net income of $450,000 in 2009 and $620,000 in 2010. The company had average total assets of $2,500,000 in 2009 and $3,000,000 in 2010. Calculate the return on total assets for 2009 and 2010. Comment on the results. 10. A company reported net income for 2009 of $98,000 and $106,000 in 2010. It also reported net sales of $735,000 in 2009 and $798,000 in 2010. The company's average total assets in 2009 were $1,850,000 and $1,720,000 in 2010. Calculate this company's profit margin, total asset turnover, and return on total assets for 2009 and 2010. Comment on the results. 11. A company reported net income for Year 1 of $98,000 and $106,000 for Year 2. It also reported net sales of $835,000 in Year 1 and $918,000 in Year 2. The company's average total assets in Year 1 were $1,850,000 and $1,720,000 in Year 2. Calculate the company's profit margin, total asset turnover and return on total assets for Year 1 and Year 2. Did the company's return on total assets improve? What component(s) might explain this change? 12. A company had net income of $86,000 in Year 1 and $118,000 in Year 2. Its net sales were $640,000 in Year 1 and $611,000 in Year 2. Its average total assets in Year 1 were $1,670,000 and $1,712,000 in Year 2. Calculate the profit margin, total asset turnover and return on total assets for both years. Comment on the results